When John Adams was working on his Chamber Symphony (1992), he became aware that his son Sam was in the next room watching old American cartoons, presumably those by Warner Bros. that used music by the great Raymond Scott. Hyperkinetic borrowings from Scott's witty scores made their way into that earlier work, and now into its successor, a fact hinted at by its humorous title: Son of Chamber Symphony. There's even a moment early on in this new work when the distinctive rhythmic rumble of Scott's masterpiece, "Powerhouse," can be fleetingly heard in what is, overall, a short but very sweet triumph.